Diagnosis is best made by magnetic resonance imaging (MRI): fluid-filled cavity within the spinal cord and cerebellar tonsil herniation. The dogs either have progressive cranial (eg, facial deficits, seizures, vestibular syndrome) or spinal (eg, hyperesthesia with persistent scratching of shoulder and neck region) symptoms.Hyper-linked titles are linked to the actual articles which are available on-line. We have reviewed 30 cases of canine Chiari type 1 malformations diagnosed via MRI at our hospitals from 2001 to 2002.
J Vet Intern Med; May/June 2005;19(3) (ACVIM 23rd Ann. Foramen magnum decompression (FMD) is usually performed for humans with symptomatic Chiari I malformation; results are favorable, with better outcomes being attained with early surgical intervention.
One dog did not improve, one dog worsened and was euthanized, and one dog died nine days following repeat FMD (the tetraparetic dog), due to a suspected ruptured viscus. Hypothesis: The use of amantadine in addition to NSAID therapy will provide improved pain relief when compared with the use of nonsteroidal analgesics alone in naturally occurring OA in dogs. Quote: "The pain behaviour expressed by dogs with syringomyelia suggests that they experience neuropathic pain, probably due to disordered neural processing in the damaged dorsal horn. Caudal occipital malformation syndrome (with syringohydromyelia) " pp. ""Caudal occipital malformation syndrome is the canine analog of Chiari type I malformation of people. Schmidt, Antje Wigger, Sebastian Jawinski, Tanja Golla, Martin Kramer. Normal sonographic findings of this region in 10 normal brachycephalic dogs are presented and compared with sonographic findings from 25 Cavalier King Charles Spaniels with the caudal occipital malformation syndrome. In one dog, a syrinx was identified by ultrasonography.
Repeat surgery was performed in 4 dogs (25%), due to constrictive scar tissue formation at the original FMD site. Animals: Thirty-one client-owned dogs with pelvic limb lameness despite the administration of an NSAID. On day 21, all dogs received amantadine (3–5 mg/kg once daily per os) or placebo for 21 days, in addition to receiving meloxicam. As such it is likely that conventional analgesic medication will be ineffective. Quotes: ""Breed-associated neurologic abnormalities of dogs and cats. Although only recently described in dogs, COMS appears to be a very common neurologic disorder in this species. Sonographic findings were compared with magnetic resonance imaging findings to determine the extent of cerebellar herniation and syringohydromyelia. The only difference between dogs with or without syringomyelia was that dogs with Chiari-like malformation/syringomyelia were statistically older.
The purpose of this study was to describe clinical results of a FMD procedure in 16 dogs with COMS.
Cases were restricted to dogs with MRI evidence of COMS and no other neurologic disorders.